Sep 13, 2012 - When Anderson Silva steps into the octagon to face Stephan Bonnar at UFC 153, it will be one of the most lopsided main-event fights in terms of odds the UFC has ever seen.

According to the early line, which was released on Thursday morning, Silva will be a massive favorite. In fact, its the highest opening line ever for an Anderson Silva fight, oddsmaker Nick Kalikas told MMA Fighting.

Silva has been installed as a -1350 favorite, according to Kalikas of MMAOddsbreaker.com. That means that Silva is essentially a 93 percent favorite to win.

Prior to this, Silva's highest line was in another non-title fight, his July 2008 Fight Night bout against James Irvin, which he won in a 61-second knockout. In that fight, he opened at -600.

Some of the most lopsided UFC main event lines have ended in shockers. In 2010, B.J. Penn met Frankie Edgar as a -850 favorite and lost in a unanimous decision. Georges St-Pierre was an even more decisive favorite at UFC 69, taking opening line odds of -1000 into his welterweight title matchup with Matt Serra. Of course, Serra won by knockout in a shocking upset.

There have been more lopsided major bouts, however. According to MMA Fighting's research, the highest odds found in a recent major event were -2500, which happened in two separate promotions. In February 2007, Rameau Thierry Sokoudjou upset heavy favorite Antonio Rogerio Nogueira, while in a June 2010 Strikeforce event, Cris Cyborg easily handled underdog Jan Finney.

Bonnar (14-7) takes a three-fight win streak into the matchup, which is scheduled for three rounds in the light heavyweight division.

Silva (32-4) has never lost in the Octagon, taking a UFC record 15-fight win streak into UFC 153, which takes place on Oct. 13 from Rio.

It's interesting in the aspect that Bonnar has never been submitted or TKO'd. Can Anderson do it within 3 rounds? My first thought is yes, but Bonnar is a HUGE 205'er and if he uses it correctly, could grind out a decision, if he can 'Chael' Anderson onto the ground and hold him there. I like these kinds of 'one off' fights, and am looking forward to it.